Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1551
PUT
HealthEquity
HQY
$7.91B
| $1.48M | ﹤0.01% |
227
+50
| +28% | +$3.48K |
|
1552
Dillards
DDS
$8.87B
| $1.48M | ﹤0.01% |
+23,784
| New | +$1.53M |
|
1553
CALL
Papa John's
PZZA
$999M
| $1.48M | ﹤0.01% |
331
-1,998
| -86% | -$98.5K |
|
1554
PUT
AMC Global Media
AMCX
$430M
| $1.48M | ﹤0.01% |
271
+215
| +384% | +$12.1K |
|
1555
CALL
Tower Semiconductor
TSEM
$26.4B
| $1.47M | ﹤0.01% |
935
+751
| +408% | +$12.5K |
|
1556
CALL
Martin Marietta Materials
MLM
$33.6B
| $1.47M | ﹤0.01% |
64
-159
| -71% | -$34.4K |
|
1557
CALL
Matador Resources
MTDR
$6.31B
| $1.47M | ﹤0.01% |
738
-163
| -18% | -$3.1K |
|
|
WORK
1558
CALL
DELISTED
Slack Technologies, Inc.
WORK
| $1.47M | ﹤0.01% |
+391
| New | +$14.4K |
|
1559
PUT
Philips
PHG
$25.4B
| $1.46M | ﹤0.01% |
423
-382
| -47% | -$12.3K |
|
1560
CALL
Huntington Ingalls Industries
HII
$11.3B
| $1.46M | ﹤0.01% |
65
+4
| +7% | +$857 |
|
|
NVTA
1561
CALL
DELISTED
Invitae Corporation
NVTA
| $1.46M | ﹤0.01% |
621
+201
| +48% | +$4.28K |
|
|
ESV
1562
PUT
DELISTED
Ensco Rowan plc
ESV
| $1.46M | ﹤0.01% |
1,707
+1,222
| +252% | +$14.1K |
|
1563
PUT
Nexstar Media Group
NXST
$5.6B
| $1.45M | ﹤0.01% |
144
+115
| +397% | +$12.3K |
|
1564
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$332M
| $1.45M | ﹤0.01% |
790
+519
| +192% | +$1.03M |
|
|
WW
1565
PUT
DELISTED
WW International
WW
| $1.45M | ﹤0.01% |
758
+156
| +26% | +$3.09K |
|
1566
PUT
Royal Gold
RGLD
$17.1B
| $1.45M | ﹤0.01% |
141
-33
| -19% | -$2.97K |
|
|
DFS
1567
PUT
DELISTED
Discover Financial Services
DFS
| $1.44M | ﹤0.01% |
186
+119
| +178% | +$9.22K |
|
1568
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $1.44M | ﹤0.01% |
154
-36
| -19% | -$3.52K |
|
|
LNW
1569
CALL
DELISTED
Light & Wonder
LNW
| $1.44M | ﹤0.01% |
728
-449
| -38% | -$9.29K |
|
1570
CALL
Varonis Systems
VRNS
$5.25B
| $1.44M | ﹤0.01% |
696
-33
| -5% | -$709 |
|
1571
PUT
InterDigital
IDCC
$6.68B
| $1.44M | ﹤0.01% |
223
+162
| +266% | +$10.8K |
|
1572
PUT
Moderna
MRNA
$21.5B
| $1.43M | ﹤0.01% |
980
+955
| +3,820% | +$20.5K |
|
|
WP
1573
DELISTED
Worldpay, Inc.
WP
| $1.43M | ﹤0.01% |
+11,706
| New | +$1.39M |
|
1574
CALL
Icahn Enterprises
IEP
$5.17B
| $1.43M | ﹤0.01% |
198
+9
| +5% | +$653 |
|
1575
CALL
ICICI Bank
IBN
$106B
| $1.43M | ﹤0.01% |
1,138
+1,082
| +1,932% | +$12.5K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.